The golden-brown invaders from the Caribbean and South America run around erratically and cause property damage but don't sting like fire ants.

Fire ant baits don't work well because they contain oil to attract those fat-loving pests. Their crazy cousins hate oil.

Researchers also advise homeowners to remove leaves and other yard litter where the insects like to nest. They also should fix leaky outdoor faucets and sprinkler systems and minimize standing water sources.

There are more than 20 counties with one or more confirmed reports of the invasive crazy ant colonies, researcher Faith Oi told WPBF 25 News. Among the affected counties are Indian River, St. Lucie, Martin and Palm Beach. Researchers said Sarasota County has been hardest-hit.

Extermination efforts work best in February and March before the breeding season begins.